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Prospective, two arms, randomized multi-center trial in Asian-pacific region. Following angiography, patients with chronic total occlusion (more than 3 months) have documented myocardial ischemia or symptoms of angina, and eligible for stenting without any exclusion criteria will be randomized 1:1 to: a) drug-eluting stent vs. b) optimal medical treatment. All patients will be followed for at least 3 year.

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Ages Eligible for Study:

18 Years and older (Adult, Older Adult)

Sexes Eligible for Study:

All

Accepts Healthy Volunteers:

No

Criteria

Inclusion Criteria:

Clinical

Patients with angina or silent ischemia and documented ischemia

Patients who are eligible for intracoronary stenting

Age > 18 years

Angiographic

De novo lesion CTO

Reference vessel size 2.5 mm by visual estimation

At least one CTO lesions located in proximal or mid epicardial coronary artery. (If the patient has two CTO lesions, one CTO lesion should be located in proximal or mid epicardial coronary artery)

CTO definition: TIMI flow 0 and estimated duration over 3 months The duration of the occlusion was determined by the interval from the last episode of acute coronary syndrome, or In patients without a history of acute coronary syndrome, from the first episode of effort angina consistent with the location of the occlusion

Angiographically defined total occlusion over 3 months

If no definite symptom with total occlusion, two experienced operators decide CTO in consideration of angiographical morphology (degree of calcification, bridging collaterals, non-tapered stump, angiographic filling from collaterals)

Exclusion Criteria:

History of bleeding diathesis or coagulopathy

Pregnant state

Three vessel CTO

Known hypersensitivity or contra-indication to contrast agent and heparin